Ditcher



April 12, 1932.

A. C. RASMUSSEN ET AL DITCHER Filed April 18, 1929 2 Sheets-Sheet '1 Alvin 6. fiasmussen, Raymond 00rward+ Lyman 67a ire Gero w,

Momma I April 9 A. c. RASMUSSEN ET AL- 1,854,152

DITCHER Filed April 18, 1929 2 SheetsSheet 2 'fllw'n 6'. Rasmussen, Raymond Durward Lyman Claire erau;

Patented Apr. 12, 1932 PATEN FFEQ ALVIN"CIR-ASIVHJ'SSEI T, RAYMOND DORWARD, AND L'YMAN CLAIRE-GEROW, OF INDIAN- APOLIS, INDIANA, ASSIGNORS TO INSLEY-MANUFACTZURING COMPANY, OF INDIAN- APOLIS, INDIANA, A GORPOBATIONOF INDIANA DITCI-IER Application filed April 18,

. on 'the boom and for-positively shifting the bucket sticklongitudinallyrelative to'its pivotal mounting.

Theaccompanying drawings illustrate our invention.

Fig. 1 is a side elevation of an embo'di- =ment of our invention;

'Fig. 2 a'plan;

Fig.3a side elevation ofanother embodi- -ment, and

Fig. 4a plan of the embodiment shown in Fig. 3.

i n the drawings 10 indicates a boom stepped, at 12, upon a-horizontal axis'so that the boom may swing in vertical planes, the 25 step 12 being conveniently, and most generally,- carried upon a turn table '13,'su'pport- 'edby a-suitable traction device (not shown) of common form, the completed mechanism embodying a well known mechanism by means of which the'turn'tablewith its associated parts may be swung about a vertical 2X15.

Supported ator near the outer'end'of boom 10 is a pivot pin '15 upon which is pivoted a yoke 16 in which is s'lidably'inounted a bucket stick 1'? to the lower end of which is secured a suitable excavating bucket 18. 'The association of parts '15, 16 and 17 is such that the stick 17 may swing about pin '15 and-may slide lengthwise inyoke 16 and relative to'pin 15.

Journaled upon pin 15, at each side of yoke 16-is a sheave 19. 7

Referring now to Figs. -1 and 2, 20, 20 are two stiff links, capable of acting either as struts-or ties, which, at their outer ends are pi-votall-y connectedat 21 to the bucket stick 17'beyond pin 15, and at theirinne'r endsare pivotally connected at 22 to boom '10 between 150 step 12and pin 15.

1929. Serial No. "356,043.

' In the form shown in Figs. 3 and 4, in stead of links 20, I provide links 20 which, atone end are pivotally connected at 22 to the boom, and a't'their other ends are pivotally connected at 23 with'the upper end of L stick 17.

A bumper block-25 is secured to'the upper side of the boom in position to be engaged by the upper-endofthe stick 17 when said stick is in its extreme projected position.

In-order to draw the bucket towards "the base of the boom, I provide a pull line wvhich extends from a winding drum 31 to' the lower end of the stick. The precise form of connection between this pull line and the lower end of the stickmay be varied to a "and in the'drawings "I have illustrated this connection as a bail'32 attached to an ear 32 -connecting thebucket and stick, and a sheave 33 over which the pullline is reeved, said line being also=reeved over a sheave 34'journaled at 35 at an intermediate point in the length of the boom.

Suitable well known means (not shown), will be provided for controlling drum 31.

The stick "'17 'is'swung towards projected position by means of a'pull line 40 anchored tothe lower'end ofthe stick, conveniently on pin 21. Conveniently this line 40 is in two passes, each passing over one of the two sheaves 19 journa'led on pin 15 at each side of yoke "16. A desired pull is exerted upon the pull line 40 from a winding drum 41 which, like'drum 31, willbe provided with a common form of control mechanism (not shown).

In Fig. 1 this pull is exerted'by means of a pull line 40 reeved around sheaves 42, 42

journaled at the upper end of a jack frame 43, and sheaves 44, 44 journa'led upon a suitable mast or stationary support, such a mast or support being well known in the art.

In this form the inner ends of the two pull lines 40 are anchored upon the upper end of the jack frame, conveniently upon the pin 45, upon which the sheaves 42 are ournaled.

In Fig.3 the jack frame 43 is omittedand the sheaves 42 are journaled in a sheave block 43 and in this form the two passes of the line are anchored upon an equalizer sheave 46 journaled in the block 43.

In the form shown in Fig. 1 the jack frame 43 is stepped at its lower end upon platform 13, conveniently upon pin 12 upon which the lower end of the boom is stepped.

The operation is as follows:

Vith the parts in the positions shown in the drawings, inward pull upon lines 40 will swing the boom upwardly, and inward pull on line 30 will draw the bucket towards the base of the boom, the free end of the boom swinging upwardly and the bucket stick swinging on pin 15 and, by reason of the action of links 20 1) or links 20 (Fig. 3) sliding outwardly through yoke 16. The operator, by independently manipulating the two winding drums 31 and 41, may swing the bucket stick from the position shown in full lines in Fig. 1 to the position shown in dotted lines in Fig. 1 angularly relative to the boom, and may raise and lower the boom about its step to bring the bucket to any desired position within the possible are of swing and to any desired vertical position within the range of vertical swing of the boom.

We claim as our invention:

1. An excavator comprising a vertically swinging boom, a bucket stick pivotally and longitudinally slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with the bucket stick and at the other end to the boom, a pull line connected to said bucket, a second pull line connected to the lower end of the stick, and a pull line guide carried by the boom and engaging the under side of the last-mentioned pull line at an intermediate point in its length, and draft means by which said pull lines may be independently manipulated.

2. An excavator comprising a vertically swinging boom, a dipper stick longitudinally movably mounted on said boom, a dipper rigid on said stick, means associated with said dipper stick and connected to said boom for pivotal movement relative to said boom, linkage means connecting said boom and stick to eliect elongation of the cutting stroke of the dipper by compelling longitudinal movement of said stick as said stick is swung downwardly, and instrumentalities for swinging the stick in a vertical plane.

3. An excavator comprising a vertically swinging boom, a crane body supporting the boom, a dipper stick, a dipper rigid on said stick, means for slidably and pivotally supporting the dipper stick relative to the upper end of the boom. linkage means directly connected with said boom and with said dipper stick for causing longitudinal downward movement of said stick as it is swung downwardly relative to said boom, a pull line connected with the dipper stick for swinging the same upwardly, and a pull line connected with said bucket for swinging said stick and bucket downwardly.

4. An excavator comprising a vertically swinging boom, a bucket stick pivotally and slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with the upper end of said stick and at the other end connected with the boom at a point spaced from the upper end of said boom, a pull line connected to said bucket, a pull line connected to said dipper stick, and draft means by which said pull lines may be independently manipulated.

5. An excavator comprising a vertically swinging boom, a bucket stick pivotally and slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with the upper end of said stick and at the other end connected with the boom at a point spaced from the upper end of said boom, a pull line connected to said bucket, a pull line connected to said dipper stick, a pull line guide carried by said boom and engaging the under side of said last mentioned pull line at an intermediate point in its length, and draft means by which said pull lines may be independently manipulated.

6. An excavator comprising a vertically swinging boom, a bucket stick pivotally and slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with said stick at a point between said bucket and the point of pivotal and slidable association between the stick and the boom, the other end of the link being attached to the boom at a point spaced from the upper end of the latter, a pull line connected to said bucket, a pull line connected to the lower end of said stick, and draft means by which said pull lines may be independently manipulated.

7. An excavator comprising a vertically swinging boom, a bucket stick pivotally and slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with said stick at a point between said bucket and the point of pivotal and slidable association between the stick and the boom, the other end of the link being attached to the boom at a point spaced from the upper end of the latter, a pull line connected to said bucket, a pull line connected to the lower end of said stick, a pull line guide carri-ed by said boom and engaging the under side of said last mentioned pull line at an intermediate point in its length, and draft means by which said pull lines may be independently manipulated.

8. An excavator comprising a vertically swinging boom, a bucket stick pivotally and slidably associated with the boom, a bucket on the lower end of said stick, a link connected at one end with said stick at a point be tween said bucket and the point of pivotal and slidable association between the stick and the boom, the other end of the link being attached to the boom at a point spaced inwardly on said boom from the point of pivotal and 5 slidable association between said stick and said boom, a pull line connected tosaid bucket, a pull line connected to the lower end of said stick, and draft means by which said pull lines may be independently manipulated.

In Witness whereof, We have hereunto set our hands at Indianapolis, Indiana, this 6 day of April, A. D. one thousand nine hundred and twenty-nine.

ALVIN G. RASMUSSEN. RAYMOND DORWARD.

LYMAN CLAIRE GEROW. 

